For backward compatibility reasons, the Nextor ROM should boot the MSXDOS2.SYS file when the NEXTOR.SYS file isn't found.
Only this way it's possible to use a standalone Nextor cartridge to fully replace a MSX-DOS2 standalone cartridge, for example. Otherwise disk games based on the MSX-DOS2 won't boot.
Konamiman
commented
5 years ago
For backward compatibility reasons, the Nextor ROM should boot the MSXDOS2.SYS file when the NEXTOR.SYS file isn't found.
Only this way it's possible to use a standalone Nextor cartridge to fully replace a MSX-DOS2 standalone cartridge, for example. Otherwise disk games based on the MSX-DOS2 won't boot.